Pulp-collecting form.



E. R. GILL. PULP COLLECTING FORNI.

APPLICATION FILED JAN. 29. 1915.

Patented Nov.' 23, 1915.

cooooo oooooo IIIIIIL LLLI and useful lmproements. in Pulp-@ollect-V Be it known that I, EDWIN nrowm n. erm., or tomas, newv wenn;

To all whom it may concern R. G ILL, a citizen' of the United States, residing l'at Yonkers, inthe county of Westchester:` andState of New York, have invented certain new ing Forms; and ll o hereby declare the f ollowing to'be a full, clear, and exact descrlption of the invention,'such.as will enable others skilled in the art to which it apper I tains to make and use the same.`

' l lhe present invention relates to -means whereby the forms employed in'paper 'manufacture for collectingl pulp by suction, or4 for transferring more A or less finished lmaterial byf air pressure may be perfected.

Forms ofthis character are generally made with wire gauze surfaces, behind which are chambers into` which air. and water may be 'f drawn, leaving a layer of pulp upon the perforated gathering surface. ln' constructing'various. shapes in this manner it is fredlllently dicult or impossible so to joinpthe s eets 'of gauze on the'surfaces as to secure a substantially vuniform'deposit, owing to v the necessity 'of using solder,.etc., for fastening joints, aswell 'as to" use in many cases of imperforate reinforcing material. lt is this diiculty which .my presentinvention isv designed to remove.

-ll have discovered' thattibi-ous material having a 'capillary'--action canbeemployed of the Asuction exerted through the perforate L40 so as to exert its'inuence as .a "group of finely divided ducts along its mass, as distinguished from merely using it for direct transmission of pressure through theflsame.

material, as wire gauze, to imperforateareas near it, t tions at Jomts' above mentioned. .j

' My inventionis illustrated in the accom-' panying; drawings in a form serving las' a mere example. 'Y

Figure 1 'shows in' dia am an apparatus for using a cylindrical ormer of the class above mentioned; and vi1'1` Fig. 2- the saidv former is shown partly'in elevation-*and partly gin section, supplied with Amy invention.

Specication' 01E-.Letters Patent. i

uch as result from the imperfec-- v p v.The gauze .covered collecting form is shown' at 10 inFig. 1, and its suction chamratent'eaitm. aa, rara.'

Application filed January 29, 1915. Serial N 0. 5,010. f o.

hausted Aby'a pump 13 connected to' said lreservoir -by a pipel lil and driven by a belt 15.

vThe details fof the hollow form are:

shown in Mg. 2, this .formbeing designed to resist; material pressures lfor compacting the layer of pulp. For this-V purpose -it cornprises. an interior shell 16 made of sheet Y' Y metal provided'with manvperorations dis j v tributed with substautial'runiformity. Over thecyllndrical surface of this shell Vis fitted the covering of wire gauze 17 and a similar gauze covering 18ys iitted over the flatv end of theform. n

In order safely. an d\ securely to join the flat sheet 18 .tothe cylindrical sheet 17 ,the two are overlapped fasshown, and jointed.

by solder or brazing asl indicatedgat 19. rIhe A two thicknesses of gau e would in itself introduce an element of disturbanceand would prevent uniform action and the presence of solder increasesthis resentdisadvantage'. f

- remedyA this di culty as follows: 'Ehe I 'two sheets 'of gauze are bentover as shown '.to Aform a channel for the area ofdisturbi ance. Within. this channel is fitted a strip 'of felt or other suitable capillary substance. 20 Which-is fastened in place in any suit-V able manner, as for*` instance, by sewing.

.The stitching is indicated dotted li-nes.

The foperationof the capillary body 20 is to absorb the water which is carried o' longitudinally orlalong the surface'toward those parts of the gauzecovering which best transmit theair pressure. I have found that where a capillary body Vis employed in this manner to-eXten'd the influence-of thesucking action transmitted through the gauze, a

`substantial uniform e'ect is'secured over the entire l"orm, .thus obvlating the diculties otherwise due tothe joints.

What l claim isf-l- 1. Inra pulp-@ducting form having the usual perforate vmaterial and having]oints offering, material obstruction to passage of ain-a layer of capillary material fastened as a covering over said joints, whereby the scope of atmospheric" action is extended along said material to produce a substantially uniform surface action.

' 2. In a pulp-collecting form, two layers of Wire gauze, overlapping to form a chan.- nel, 'means for fastening the same to form a joint at the overlapping points, and capillary material laid in said channel and fastened therein, for the purpose substantially as described.

In testimony whereof, I aix my signature, in presence of two witnesses.

. EDWIN R. GILL.` Witnesses H. S. MACKAY, KA'rriAnINE C. MEAD. 

